post https://api.simplehash.com/api/v0/nfts/refresh//
Use this endpoint to request a manual refresh of the metadata of all tokens on a specific contract. Contracts with up to 20,000 tokens can be manually queried for refresh.
This endpoint is rate limited. After requesting a refresh, it may take several minutes for any changes to be reflected when querying other endpoints. A contract may be refreshed up to once every 10 minutes.